Mr$.$ Chan started his own garment business as a young entrepreneur. The business has grown to great heights over several years. Mr$.$ Chan is nearing retirement and he would like one of his two sons to take over and run the business. However, both his sons have other interests and are unwilling to take over their father's business. Mr$.$ Chan thought that if the business cannot be handled by one of the family members, it would lose its identity. He$,$ therefore, makes a decision to sell the business. Such a decision stems from $\_\_\_\_\_.$

a$.$ the importance of mentoring people

b$.$ the emotional aspects of leadership succession

c$.$ developing a pool of successors to take on managerial roles

d$.$ the challenges of being a new leader